setDelimiterSpecs() accumulates markLength instead of recalculating

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Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
78/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
java
Domain
build-system

Research direction

Start in src/main/java/org/apache/maven/shared/filtering/MultiDelimiterInterpolatorFilterReaderLineEnding.java, focusing on setDelimiterSpecs() and calculateMarkLength(). Trace how markLength is initialized and updated, then verify that calling setDelimiterSpecs() repeatedly recalculates from the base value rather than accumulating. Run the relevant Maven test suite and add regression coverage if the existing tests do not exercise repeated calls.

Written by the indexing model from the issue text.

Description

bug

In src/main/java/org/apache/maven/shared/filtering/MultiDelimiterInterpolatorFilterReaderLineEnding.java, lines 133–141:

public AbstractFilterReaderLineEnding setDelimiterSpecs(Set<String> specs) {
    delimiters.clear();
    for (String spec : specs) {
        delimiters.add(DelimiterSpecification.parse(spec));
        markLength += spec.length() * 2;
    }
    return this;
}

markLength is accumulated on top of the current value rather than recalculated from base (255 + escapeString.length). If setDelimiterSpecs is called multiple times, markLength grows unbounded. Currently this is safe only because setEscapeString() always follows in Wrapper.getReader() and calls calculateMarkLength() which resets the value. However, this inter-call dependency is fragile and undocumented.

Dominant language
Java
Stars
9
Forks
36
Avg merge
6h 44m
Merged PRs (30d)
4

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